Vacuum pump



FIG. 1 is a top, front and right-side view of a vacuum pump, showing my new design;

FIG. 2 is an enlarged view of circle 2 of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged view of circle 4 of FIG. 4;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a rear view of FIG. 1;

FIG. 7 is a right side view of FIG. 1;

FIG. 8 is an enlarged view of circle 8 of FIG. 7;

FIG. 9 is a top view of FIG. 1;

FIG. 10 is a bottom view of FIG. 1;

FIG. 11 is a top, right side and front view of a vacuum pump, showing a second embodiment, of my new design;

FIG. 12 is an enlarged view of circle 12 of FIG. 11;

FIG. 13 is a front view of FIG. 11;

FIG. 14 is an enlarged view of circle 14 of FIG. 13;

FIG. 15 is a left side view of FIG. 11;

FIG. 16 is a rear view of FIG. 11;

FIG. 17 is a right side view of FIG. 11;

FIG. 18 is an enlarged view of circle 18 of FIG. 17;

FIG. 19 is a top view of FIG. 11; and,

FIG. 20 is a bottom view of FIG. 11.

The areas shown in broken lines depict environmental structure only and form no part of the claimed design. 

CLAIM The ornamental design for a vacuum pump, as shown and described. 